Peter la plamt



P. LA PLANT. V HORSESHOE CALK. APPLICATION men FEB.'24. 191s.

' Patented July 22, 1919.

description thereof.

PETER LA PLANT, or DULUTH, MINNESOTA.

Arnn orrrc ,HORsEsHOE-GAIQK.

:Speci fication of Letters Patent. i Patented July 22, 1919.

Application filed February 24, 1919. Serial No. 278,823.

To all whom it may concern:

Be it known that 1, PETER LA PLANT, a

V citizen of the United States, residing at Duluth, in the county ofSt. Louis and State of Minnesota, have mvented certain new and useful Improvements in HorseshoeGalks, of

which like reference characters indicate like parts:

Figure 1 is a rear elevation of one of the improved calks Fig. 2 is a vertical sectional view on the line 2 2, Fig. l;

Fig. 3 is a side elevation;

Fig. 4 is a front elevation; and

Fig. 5 is a bottom plan view. 7

1 represents the slightly tapered cylindrical shank of the calk which is similar to others of like character and upon which is integrally formed a horizontally elongated substantially rectangular-shaped ground-engaging blade, comprising the sidemembers 2 and central V-shaped member 3.

The line forming the outer apex of the V-shaped portion 3 is preferably a perfectly straight continuation of the front wall of the shank 1, and the inner apex wall a of the Vshaped portion is straight and inclined from the. lowermost end of the blade to a point 5'in line with the center of the shank and approximatelymidway between the lower end of the blade and the base of the shank.

Transverse the rear face of the upper por tion of the back of the blade is formed an outwardly extending arcuately-shaped rib or re'e'nforced heel 6, said rib extending the entire width of the blade of the calk and through which, horizontally, at right angles to its length, the dimension is greater than at any point horizontally through the shank. By this means a strong shoulder is formed upon either side of the shank of the calk, as at 7 the upperface of the shoulders being arcuate in form when viewed from the side ofthecalk, as seen in Figs. 2 and 3, with their uppermost inner edges even with a line drawn through the base of the shank.

By this construction and when the calk is driven home into a shoe, there is formed,

between the lower face of the shoe and the shoulders on the calk, a substantially wedgeshaped opening 8 between the shoe and the shoulders, one upon each side of the calk. Into these openings are placed the wedgeshaped tines of the bifurcated extracting tool commonly used by blacksmiths for such purpose, and by a persistent driving in of such wedge the calk may be extracted from the shoe.

Now in such practice with a common calk that has been badly worn away, it frequently happens that the shoulders on the calk are broken entirely off by the wedging stress of the extracting tool and the shank remains in the shoe.

But with the reinforced form of calk here shown, there is sufficient metal left belowv the shoulders to insure successful removal of the calk without being broken, as it would be in an exceptionally abnormal case when the calk happened to be left in the shoe sufiicient time for the reinforcement of the shoulders to become worn away and thus materially weakened.

The heel 6 preferably extends transversely slightly beyond the base of the shank, as seen in Figs. 2 and 3, and, as before stated, is arcuate or convex in form from such point to the point 5 at the upper inner apex of the V-shaped portion of the blade.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent is:

1. The combination with a calk of the character described having a shank and a substantially rectangularshaped blade, the front wall of which is a straight continuation of the front line of the shank and extending laterally beyond the base of the shank formingshoulders for extracting purposes, of a reinforcement for said blade, and shoulders extending transverse the full width of the blade and of arcuate form in cross-section.

2. A horseshoe calk of the character described having a shank and blade with the latter extending laterally beyond the shank forming opposed extracting shoulders and a reinforcement for the shoulders below the juncture of the blade With the shank,

at right through Which reinforcement, angles to the lateral projections 'of the blade, the dimension is greater than at any point horizontally through the shank, substantially as and for the purpose described; 3. A reinforcement for horseshoe calk blades of the character described, c0mprising an elongated horizontally disposed heel atthe juncture of the shank With the blade,

said reinforcement being. arcuatelyrshaped Copies .of-this patent may be obtained for In testimony whereof I have hereunto aflixed my signature inthe presence of two jvitnesses. p v V PETER LA PLANT.

Witnesses G. M. QUEIlLETT E, V V S. GEO. STEVENS.

five cents each, by addressing the Commissioner of Patents,

Washingtomjm 0. 

